Anyone have experience servicing a Goldtec hub axle, bearings, etc?

the factory greasing isn't especially generous, and I don't think the grease is all that good.

It's designed (both the fill and type) for high speed machinery, you're right that a different regime may be more appropriate for a bicycle wheel which never exceeds 500rpm, as against the typical 18000rpm speed limit of grease lubricated 6001 bearings.